/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshAttributeSet.h
Standard Color overlay type - 4-element float (rbga)
typedef [TDynamicMeshVectorOverlay](API\Runtime\GeometryCore\DynamicMesh\TDynamicMeshVectorOverlay)< float, 4, FVector4f > FDynamicMeshColorOverlay